*{
    margin: 0;
    padding: 0;
}

section{
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background-color: #111;
    display: flex;
    align-items: center;
    justify-content: center;
}
section h2{
    font-size: 10em;
    color: #333;
}

section span{
    position: absolute;
    bottom: -50px;
    background: transparent;
    border-radius: 50%;
    pointer-events: none;
    box-shadow: inset 0 0 10px rgba(255, 255, 255, .5);
    animation: animate 4s linear infinite;
}

section span::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    transform: scale(0.25) translate(-70%, -70%);
    background: radial-gradient(#fff, transparent);
    border-radius: 50%;
}

@keyframes animate {
    0%{
        transform: translateY(0%);
        opacity: 1;
    }
    99%{
        opacity: 1;
    }
    100%{
        transform: translateY(-1200%);
        opacity: 0;
    }
}